Eminem's music which involves Dre input is nominated for 3 Grammy Awards

Eminem is nominated for three awards, in which Dr Dre did work for.:

Best Rap Album ("Relapse")

Best Rap Solo Performance ("Beautiful")

Best Rap Performance by a Duo or Group ("Crack a Bottle," with 50 Cent and Dr. Dre).

Source - http://www.grammy.com/